KR100624029B1 - Apparatus and method for processing of LCD panel - Google Patents

Abstract

The present invention relates to a processing apparatus and method for a liquid crystal display (LCD) panel. The processing apparatus of the liquid crystal panel of the present invention comprises an alignment stage for aligning the liquid crystal panel for grinding, a grinding stage for performing grinding, and an inspection stage for inspecting the liquid crystal panel ground at the grinding stage. A work table for transferring the liquid crystal panel while reciprocating between the stage and the grinding stage is provided. The inspection stage includes a camera 14 and 14a installed to acquire an image for alignment and inspection of the grinding portion, and the grinding stage. The grinding wheels 24 and 24a which are installed and perform the grinding of the edge portion of the liquid crystal panel, the camera guides 16 and 16a which are installed to move the cameras 14 and 14a, and the work table 12 are provided. And a guide rail 22 for guiding movement to the inspection stage 11 and the grinding stage 20.

LCD panel, edge inspection, continuous shooting, grinding, alignment mark, reference mark, distortion, correction

Description

 Apparatus and method for processing of LCD panel             

       1 is a plan view of a schematic overall configuration of a processing apparatus of a liquid crystal panel of the present invention;

       2 is a block diagram of a processing apparatus for a liquid crystal panel according to the present invention;

3 is a conceptual diagram illustrating an alignment process of a liquid crystal panel.

4A to 4V are conceptual views illustrating a grinding and inspection process.

5A to 5E are conceptual views of image acquisition of the edge surface.

6A to 6E are conceptual views illustrating a process of correcting a tilt of a liquid crystal panel.

7A to 7D are conceptual views of correcting distortion of an image plane using a correction plate.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing apparatus and method for a liquid crystal display (LCD) panel, and more particularly, to aligning a liquid crystal panel, grinding an edge portion, and performing edge inspection to confirm a grinding result. By adopting an optical measuring system, images of various parts of the grinding part are continuously photographed to acquire an image, and then the defects of the grinding part are determined from the image information. It relates to a processing apparatus and a method of a liquid crystal panel.

In general, in order to manufacture a liquid crystal panel, a TFT substrate on which thin film transistors (TFTs) are arranged and a color filter substrate on which a color filter is formed are manufactured. Production process of the original liquid crystal panel to make a liquid crystal panel, a cutting process of cutting the original liquid crystal panel and separating it into unit liquid crystal panels (hereinafter referred to as 'liquid crystal panels'), which are independent display panels, and inspecting the cut surface of the separated liquid crystal panel. An edge inspection process is performed, a grinding process of grinding the side surface which is the cut surface of the liquid crystal panel which has passed the edge inspection, and an inspection process of inspecting the ground side.

In order to perform the grinding process, the edge of the liquid crystal panel must be accurately approached by the grinding wheel, and for this purpose, an alignment operation for determining the initial position of the liquid crystal panel is required. In addition, after grinding work, alignment work must be performed again to accurately photograph the grinding part for the inspection process. Therefore, two sorting operations are required to complete both the grinding process and the inspection process, which requires a lot of work time by the alignment work and at the same time, the work progress is complicated.

The inspection process to determine whether the grinding operation is performed correctly after the grinding process uses the image information obtained by photographing the grinding portion with a camera. In this case, in order to obtain an accurate image of the grinding part, the whole grinding part is divided into several parts and photographed by a camera. In this case, in order to acquire an image, an image acquisition start signal is sent to a camera, and then an image acquired according to the signal is acquired. As described above, in order to acquire an image through the camera, an image acquisition signal must be transmitted to the camera each time, and since the camera starts receiving the image, the operation of the camera is complicated and the process of acquiring the image is complicated. Difficult problems arise in maintenance.

The present invention is to solve the above-mentioned problems, to present an inspection process to reduce the alignment process to one time to shorten the time of the edge inspection process, and to obtain the image of the grinding part simply and easily by improving the camera operation method To present an implementation plan.

In order to achieve the above object, the present invention is made to perform the inspection after grinding the liquid crystal panel. The processing apparatus of the present invention includes a grinding wheel for grinding the liquid crystal panel, a work table on which the liquid crystal panel is seated, and a guide rail serving as a guide of the work table. In addition, the processing apparatus of the present invention includes an image acquisition unit including a camera and a storage unit for storing an image obtained by the camera and an illumination control unit including an illumination. The work table includes a vacuum pad to seat the liquid crystal panel, and includes driving means for performing movement and rotation in the x and y directions. The driving means for driving the work table includes an actuator for driving and a driver for driving the actuator. The drive of the working table and the grinding wheel of the device of the invention is carried out via a driver in accordance with the instructions of the machine control section. The central control unit determines whether there is a defect in the liquid crystal panel after grinding through the image information obtained from the image acquisition unit, controls the lighting control unit and the image acquisition unit, and exchanges information with the machine control unit. Preside over In the process of making a liquid crystal panel, a unit liquid crystal panel is manufactured by bonding and assembling a color filter substrate having a color filter formed on a TFT substrate on which thin film transistors are arranged. This requires a process of grinding the edges.

The processing method of the liquid crystal panel of the present invention for achieving this object is composed of an alignment stage for aligning the liquid crystal panel for grinding, a grinding stage for performing the grinding and an inspection stage for inspecting the liquid crystal panel ground in the grinding stage. And a work table for transporting the liquid crystal panel while reciprocating between the alignment stage and the inspection stage and the grinding stage to perform polishing and inspection operations of the edge portion of the liquid crystal panel.

  a) inputting power to a machine control unit, a central control unit, an image acquisition unit, an illumination control unit, etc. to perform grinding and inspection;

  b) obtaining an image of an alignment mark when the liquid crystal panel is seated on the work table from the previous process, and determining and aligning an alignment position for grinding the liquid crystal panel from the image of the alignment mark;

  c) moving the aligned liquid crystal panel to a grinding stage through a working table;

  d) polishing two edges facing each other among the four edges in the liquid crystal panel moved to the grinding stage;

  e) rotating the edge 90 degrees after the polishing of the two edge portions to perform polishing of the remaining edge portions;

  f) moving the ground-finished liquid crystal panel from the grinding stage to the alignment stage but moving to the alignment position set in step b);

  g) inspecting one of the four edges while moving the liquid crystal panel of the alignment stage and acquiring an image of a predetermined position during the edge;

  h) after completing step g), rotate the liquid crystal panel 90 degrees to inspect another edge of the liquid crystal panel, and acquire an image of an edge of which no image is obtained among four edges, but acquire an image of a predetermined position;

  i) acquiring images of all edges of the liquid crystal panel while continuously performing step h);

  j) the image obtained at each edge is stored in the image acquisition unit at the time of acquisition, and the stored image is read out by the central control unit to determine the amount of grinding through the image processing to check the defective product.

      In this step, the alignment step of the liquid crystal panel is performed only once before the grinding process, because the alignment step to be performed before the inspection process utilizes the information aligned before the grinding process in the inspection process. That is, since the alignment position has already been determined in the alignment step (b) performed before the grinding process, the inspection start position is used by using the alignment position determined in the above (b) step when inspecting the liquid crystal panel after the grinding operation is completed. No sorting is done before. If the liquid crystal panel may be pushed or deformed during the grinding operation, this can be overcome by calculating the acquired image and correcting the change, which will be described below.

   Hereinafter, a process of acquiring and aligning images will be briefly described. For the sake of understanding, the operation states of the components related to the alignment of the liquid crystal panel will be described. When the liquid crystal panel transmitted from the previous process is seated on the work table, the system is configured such that the alignment mark of the liquid crystal panel is captured in the image acquisition area of the camera. Basically, the camera is activated as long as the inspection device is initially activated, and the camera is continuously operated. Therefore, it is not necessary to transmit a separate image acquisition signal.

1-1) After the liquid crystal panel is seated on the worktable so that the alignment mark of the liquid crystal panel is captured in the image acquisition area of the camera, the machine control unit 26 transmits a signal that the loading of the liquid crystal panel is completed to the central control unit 25. do.

1-2) After the central control unit receives the loading completion signal, the central control unit captures the image captured by the camera in the loading completion state and stored in the image acquisition unit.

 1-3) The central controller determines the center of the alignment marks 32 and 32a through image processing.

1-4) The central control unit measures the difference between the centers 15_C and 15a_C of the image acquisition areas 15 and 15a and the center of the alignment marks 32 and 32a, and the camera image acquisition areas 15 and 15a. The amount of movement of the work table necessary to match the center of the center 15_C (15a_C) with the alignment marks 32 (32a) (dx, dy, dθ; where dx is the x direction travel distance and dy is the y direction travel distance, dθ Is the angle to which the worktable should be rotated).

1-5) The central control unit transmits the determined movement amounts dx, dy, and dθ to the machine control unit.

1-6) The machine control unit receives the movement amount (dx, dy, dθ) of the work table and then moves the work table through the driving means, so that the center 15_C (15a_C) of the camera image acquisition area 15 (15a) is moved. And the center of the alignment marks 32, 32a.

   The process of calculating the movement amount of the work table through the image processing is determined through an image processing and a geometrical calculation process, which is a technology that can be implemented by those of ordinary skill in the art. Omit.

Hereinafter, with reference to the accompanying drawings will be described a preferred embodiment for the grinding operation and the inspection process according to the present invention.

 1 is a plan view showing a schematic overall configuration of a processing apparatus of a liquid crystal panel of the present invention.

       The apparatus of FIG. 1 can be largely divided into three parts, comprising an alignment stage 10 for aligning the liquid crystal panel, a grinding stage 20 for performing the grinding operation, and an inspection stage 11 for inspecting the liquid crystal panel for which the grinding operation is completed. In addition, the worktable 12 is mounted to the liquid crystal panel delivered from the previous process, the camera 14 (14a) for acquiring an image for the inspection of alignment and grinding, and the grinding wheel for grinding the edge of the liquid crystal panel 24, 24a, camera guides 16 and 16a for movement of the cameras 14 and 14a, and the work table 12 guide the movement to the inspection stage 11 and the grinding stage 20. It consists of a guide rail (22).

Figure 2 shows a block diagram of the processing apparatus of the liquid crystal panel according to the present invention. The apparatus of FIG. 2 loads the liquid crystal panel onto a worktable for grinding and then performs alignment for accurate grinding.

 First, the alignment process of the liquid crystal panel will be described with reference to FIGS. 2 and 3.

       When the liquid crystal panel 30 is loaded on the work table 12, since it is properly loaded, the camera 14 and 14a are likely to be loaded in an inclined form (see FIG. 3B) in an unaligned state. ), The centers 32 and 32a of the alignment marks do not coincide exactly with the centers 15_C and 15a_C of the image acquisition areas 15 and 15a (see d in FIG. 3). Therefore, in order to match the center 32, 32a of the alignment mark with the center 15_C, 15a_C of the camera 14, 14a, the image acquisition area 15, 15a, the center of the alignment mark from the image acquired from the camera. Determine the distance between the centers 15_C and 15a_C of the alignment mark and the centers 15_C and 15a_C of the image acquisition area 15 and 15a of the camera, and the two alignment marks 32 After measuring the angle formed by the line segment 34 connecting the center of 32a and the line segment 36 parallel to the line segment connecting the virtual center of the camera, the measured values are applied to move the work table (see FIG. See e of FIG. 3).

Hereinafter, a schematic process of alignment, grinding and inspection of the liquid crystal panel will be described with reference to FIGS. 4A to 4V.

 Referring to FIG. 4A, the work table 12 loaded with the liquid crystal panel, the camera 14 and 14 a for acquiring an image, the grinding wheels 24 and 24 a for grinding the liquid crystal panel, and the work table 12 are guided. Camera guides 16 and 16a for guiding the movement of the table guide 22 and the cameras 14 and 14a.

       4B and 4C illustrate a process in which the liquid crystal panel 30 is loaded from the previous process on the work table 12. The work table 12 has an alignment mark on the liquid crystal panel to acquire images of the cameras 14 and 14a. The position of the liquid crystal panel is determined so as to be obtained by the area.

FIG. 4D illustrates a process of aligning the liquid crystal panel. In the alignment process, as described above with reference to FIGS. 2 and 3, images including alignment marks in the cameras 14 and 14a are successively acquired. ) Is stored in the central control unit 22 to calculate the moving coordinate values (dx, dy, dθ) necessary for the alignment. The calculated result is transmitted to the machine control unit 26 and the machine control unit aligns the liquid crystal panel by moving the distance corresponding to the moving coordinate value through the work table 12 through the driver 27.

4E to 4G illustrate a process of performing grinding by moving the liquid crystal panel on which the alignment is completed to the grinding stage.

       At this time, the worktable moves the liquid crystal panel along the worktable guide according to the instructions of the machine control unit to the grinding stage, and performs the grinding work of the edges facing each other while passing through the rotating grinding wheels 24 and 24a after arriving at the grinding stage. do.

4H and 4I illustrate a process of rotating the liquid crystal panel 90 degrees for the grinding operation of the remaining non-grinded edge portion after finishing the edge portions facing each other in the liquid crystal panel.

     4J and 4K illustrate a process of transferring a grinding wheel to a width of the liquid crystal panel by rotating the liquid crystal panel 90 degrees, and moving the liquid crystal panel to perform grinding of the remaining edge portions.

4L to 4N illustrate a process of moving the liquid crystal panel to the inspection start position for the inspection operation after rotating the liquid crystal panel 90 degrees after the grinding operation is completed.

       At this time, the inspection start position of the liquid crystal panel is the same as the alignment position determined in FIG. 4D. That is, the inspection start position means the alignment position where the liquid crystal panel is aligned to perform the grinding operation, not the position where the liquid crystal panel is initially loaded on the work table. This is because the camera 14 (14a) is advantageous in the alignment position determined in Fig. 4d in order to obtain an image of the ground edge portion of the liquid crystal panel.

4O and 4P illustrate a process in which the liquid crystal panel starting from the inspection start position inspects the ground edge portion while passing through the image acquisition position of the camera. Introducing a process of acquiring the image of the ground edge portion, since the camera is in an active state, since the image is continuously acquired and stored in the image acquisition unit 28, a separate image acquisition signal needs to be transmitted to the camera for image acquisition. There is no. The inspection method will be described later. FIG. 4q illustrates a process of rotating the liquid crystal panel 90 degrees to inspect another edge surface requiring inspection, and FIGS. 4r and 4q illustrate a process of adjusting the position of the camera to fit the edge of the liquid crystal panel. will be.

4s and 4t show a process of inspecting another ungrounded surface as the liquid crystal panel returns to its original position, and FIG. 4u shows that the liquid crystal panel is initially moved to inspect another edge surface or move to the next process. It shows the process of rotating 90 degrees to change to the loaded form, and 4v is completed. The inspection is repeated by repeating FIGS. 4Q to 4V until the entire edge surface inspection of the liquid crystal panel is completed.

Hereinafter, an inspection process of the liquid crystal panel will be described with reference to FIGS. 5A to 5E.

FIG. 5A shows an element to be inspected in the liquid crystal panel, and the distance 37 between the predetermined position 36 of the reference mark 35 and the edge surface 32, the grinding line 33, and the edge surface 32, The distance 38 is the main test element. At this time, it is preferable that the distance 37 of the reference mark and the edge surface is obtained from the camera 14 positioned above the liquid crystal panel, and the distance 38 between the grinding line and the edge surface is located below the camera 19. It is desirable to acquire an image with a. In order to obtain a good quality image, it is very important that the lighting is properly adjusted, and in the present invention, the position of the lighting (see 15, 15a, 18, and 18a of FIG. 2) is shown together with the camera. The angular brightness is determined through several attempts to obtain the optimal image for those skilled in the art as needed.

       As shown in FIG. 5B, when the liquid crystal panel moves in the A direction and moves from the bottom of the camera 14 to stop, the camera 14 stores an image of a predetermined position of the liquid crystal panel in the image acquisition unit and stores the stored image data in the central control unit 25. Inspect the condition of the ground edges obtained at. At this time, the position of the image acquired by the camera and the movement distance 42 according to this are predetermined values according to the model of the liquid crystal panel, and the predetermined position in FIG. 5A is determined as determined according to the model of the liquid crystal panel ( 40a, 40c, 40f, ...).

       FIG. 5C illustrates a process of acquiring an image while rotating 90 degrees and intermittently moving in the B direction to inspect another edge portion of the liquid crystal panel. When the liquid crystal panel stops after a certain distance 52, the camera moves to a predetermined region. The image of 50a is stored in the image acquisition unit. 5D and 5E illustrate a process of acquiring an image of the remaining edge portions of the liquid crystal panel. When the liquid crystal panel is stopped after moving the liquid crystal panel by a predetermined distance (62, 72), the camera captures an image of the predetermined area (60a, 70a). Store in the acquisition unit. The stored image data is acquired by the central controller 25 and inspects a state of the ground edge portion.

The signal transmission system between the machine control unit 26 and the central control unit 25 in the above-described inspection process will be described.

2-1) The machine control unit 26 transfers the arrival completion signal to the central control unit 25 after the liquid crystal panel is moved to a predetermined position.

2-2) After the central control unit receives the arrival completion signal, one central control unit acquires the image acquired by the camera and stored in the image acquisition unit, and transmits the work completion signal to the machine control unit.

2-3) After receiving the work completion signal, the machine control unit moves the liquid crystal panel to the next position, and then transfers the arrival completion signal to the central control unit.

2-4) Repeating steps 2-2) and 2-3), the central control unit acquires all the images of the required portion of the liquid crystal panel.

2-5) The central control unit performs the inspection operation through the image obtained through the process 2-4).

Hereinafter, a process of correcting the slope from the image data obtained from FIGS. 6A to 6E will be described.

       The inspection operation is a process of determining the quality and defect of the grinding by determining the degree of grinding and obtaining an image of the ground portion from the camera and the image is processed by the central control unit to determine the good and defective according to the grinding state. 6D and 6E, the inspection process examines the distance 95 between the grinding line 94 generated by grinding on the ground portion and the reference mark 93 generated near the edge of the liquid crystal panel. According to the result of the distance, whether good or bad is judged. In this case, as shown in FIG. 6E, the grinding line of the image obtained in the inspection process is inclined at a predetermined angle (θ) because the alignment state of the liquid crystal panel is not correct. This can be obtained. At this time, if the distance between the grinding line and the reference mark is measured without considering the inclined state of the grinding line, the liquid crystal panel is inclined, so the distance between the grinding line 94 and the reference mark perpendicular to the reference mark (95) is not a. It becomes b which is the inclination distance 96. From the geometric relationship shown in Fig. 6e, it can be seen that a is b · cosθ. Therefore, the measured b must be corrected through the inclination angle (θ) to measure the exact distance a of the reference mark and the grinding line. It can be seen that. Therefore, to summarize the process of correcting the tilt from the image obtained by the central control unit,

3-1) Grinding line shown in images (80, 81, 82, 83, 84: see Fig. 6a) of the grinding portion acquired by the camera (the actual image shows the reference mark and the grinding line at the same time, and determine the actual grinding degree How to determine is determined by measuring the distance between the reference mark and the grinding line, but in this nickname, only the grinding line as shown in Figures 6a to 6c for convenience) to determine the virtual grinding line (88, 92).

3-2) An imaginary reference line 90 generated in parallel with the trajectory of the work table is obtained.

3-3) Check the angle θ formed between the virtual grinding lines 88 and 92 of the process 3-1) and the virtual reference line 90 obtained from the process 3-2.

3-4) Obtaining b, which is the distance 96 between the reference mark 93 and the grinding line 94, and correcting the b using the angle obtained in step 3-3, while being perpendicular to the grinding line 94 A which is the distance 95 to the reference mark 93 is obtained.

       The length information and the angle information of the virtual grinding lines 88 and 92 are easily obtained through an image processing process. When the inspection is performed in consideration of the obtained information, it is necessary to perform a separate alignment for the inspection work. Not only is it possible to cope with changes in the alignment state of the liquid crystal panel that may be in the process of inspection in real time, which is a very useful inspection method. Although the method of determining the grinding lines 88 and 92 has been described using a plurality of grinding part images, it is natural that one or more grinding part images may be determined.

As described above, in order to perform an accurate inspection through the image, the length obtained from the image by correcting the image must match the actual length. However, in general, images obtained through a camera are often distorted due to distortion of the lens and optical system, and accurate image processing is impossible unless the distortion is compensated for.

Hereinafter, a process of correcting an image acquired by the camera will be described with reference to FIGS. 7A to 7D.

       FIG. 7A is a correction plate for correcting an image plane, wherein the correction plate has a plurality of circular shapes having a checkerboard shape, and the center of each circular shape has an accurate center coordinate. When the correction plate having the square checkerboard is viewed through the image, the actual checkerboard of the square is shown as a failure type as shown in FIG. 7B or a barrel shape as shown in FIG. 7C due to the distortion of the image plane. These distortions are different in degree, but are correct for most optical systems because they are included aberrations. To clean up the calibration process

4-1) Using the image acquisition unit of the inspection device to obtain an image of the checkerboard circular point and the correction plate knowing the exact coordinates of the circular point.

4-2) The center point of the circular point is obtained through image processing, and the distortion of the image plane is corrected using the coordinate of the center point as the coordinate of the correction plate.

 Since the image plane distortion of the inspection device is constant as long as the optical system does not change, the calibration process is performed only once when the inspection device is initially set up, and only the results are applied during the inspection. no need. Since the process of correcting the image plane with the center point of the circular point corresponds to a technique that can be performed by those skilled in the art as necessary, the detailed description thereof will be omitted. The technical spirit of the present invention has been described above with reference to the accompanying drawings, but this is by way of example only and not intended to limit the present invention. In addition, it is obvious that any person skilled in the art can make various modifications and imitations without departing from the scope of the technical idea of the present invention.

As described above, the present invention not only maximizes the work efficiency by omitting a separate alignment operation during the grinding process and the inspection process, but also corrects the alignment state from the obtained image to select the correct product.

In addition, in the present invention, since the central control unit acquires the image immediately without transmitting a separate signal to the camera in the process of acquiring the image, not only can the image be easily obtained, but also the inspection process is efficient, and the configuration and maintenance of the system is easy. Simple.

In addition, the present invention is expected to increase the accuracy of the inspection process by minimizing the distortion of the image surface by using a sophisticated correction plate to correct the image obtained from the camera.

Claims (8)

It consists of an alignment stage for aligning the liquid crystal panel for grinding, a grinding stage for performing the grinding and an inspection stage for inspecting the liquid crystal panel ground in the grinding stage, while reciprocating between the alignment stage and the inspection stage and the grinding stage The processing method of the liquid crystal panel having a work table for transferring the liquid crystal panel to perform the polishing operation and the inspection operation of the edge portion of the liquid crystal panel,     A first step of inputting power to a machine control unit, a central control unit, an image acquisition unit, an illumination control unit, etc. to perform grinding and inspection;   A second step of acquiring an image of an alignment mark when the liquid crystal panel is seated on the work table from the previous process, and determining and aligning an alignment position for grinding the liquid crystal panel from the image of the alignment mark;   A third step of moving the aligned liquid crystal panel to a grinding stage through a work table;   A fourth step of polishing two edges facing each other among four edges in the liquid crystal panel moved to the grinding stage;   A fifth step of polishing the remaining edges by rotating 90 degrees after the two edges are polished;   A sixth step of moving the ground-finished liquid crystal panel from the grinding stage to the alignment stage but moving to the alignment position set in step b);   A seventh step of inspecting one edge of four edges while moving the liquid crystal panel of the alignment stage, and acquiring an image of a predetermined position during the edge;   An eighth step of acquiring an image of an edge of which no image is obtained among four edges after the liquid crystal panel is rotated 90 degrees after the completion of the seventh step to examine another edge of the liquid crystal panel;   A ninth step of obtaining images of all edges of the liquid crystal panel while continuously performing the eighth step; And   And a tenth step of checking the defective image by storing the captured image obtained at each edge at the time of acquisition and reading the stored image from the central controller to determine the grinding amount through image processing. Processing method of liquid crystal panel. The method of claim 1, wherein the second step is After the liquid crystal panel is seated on the worktable so that the alignment mark of the liquid crystal panel is captured in the image acquisition area of the camera, the machine control unit 26 transmits a signal that the loading of the liquid crystal panel is completed to the central control unit 25. Stage 1; Receiving a loading completion signal from the central control unit, and obtaining a video captured by the camera in the loading completion state and stored in the image acquisition unit;  The central control unit determines the centers of the alignment marks 32 and 32a through image processing, and the difference between the centers 15_C and 15a_C of the image acquisition areas 15 and 15a and the centers of the alignment marks 32 and 32a. Calculating the amount of movement of the work table necessary to match the center 15_C, 15a_C of the camera image acquisition area 15, 15a with the center of the alignment marks 32, 32a, and transmitting it to the machine control unit. 2-3 steps; And The machine control unit receives the movement amount (dx, dy, dθ) of the work table and then moves the work table through the driving means, so that the center 15_C and 15a_C of the camera image acquisition area 15 and 15a and the alignment mark ( 32) (32a) a method for processing a liquid crystal panel, characterized in that it comprises a second step of aligning the center. The method of claim 1, wherein the seventh step The mechanical control unit 26 transfers the arrival completion signal to the central control unit 25 after the liquid crystal panel is moved to a predetermined position; A central control unit receiving the arrival completion signal, the central control unit acquiring an image acquired by the camera and stored in the image acquisition unit, and then transmitting a work completion signal to the machine control unit; A seventh step in which a machine control unit receives the work completion signal, moves the liquid crystal panel to a next position, and then transfers the arrival completion signal to the central control unit; A step 7-4 of repeating steps 7-2 and 7-3, wherein the central control unit acquires all the images of the required part of the liquid crystal panel; And a central control unit (7-5) for performing an inspection operation through the image acquired through the 7-4 step. According to claim 1, wherein the process of determining the grinding amount of the tenth step A step 10-1 of determining a grinding line through image processing from the images 80, 81, 82, 83, and 84 of the grinding portions acquired by the camera; A step 10-2 of obtaining a line virtual reference line 90 generated in parallel with the trajectory of the work table; A step 10-3 for calculating an angle ?? between the virtual grinding lines 88 and 92 obtained in step 10-1 and the virtual reference line 90 obtained in step 10-2; And The reference mark 93 is perpendicular to the grinding line 94 by calculating b, which is the distance 96 between the reference mark 93 and the grinding line 94, and correcting the distance b using the angle obtained in step 10-3. And a first step (4) to obtain a, which is a distance (95) to the?). The processing method for performing the polishing operation and the inspection operation of the edge (edge) of the liquid crystal panel,     A first step of inputting power to a machine control unit, a central control unit, an image acquisition unit, an illumination control unit, etc. to perform grinding and inspection;   A second step of acquiring an image of an alignment mark when the liquid crystal panel is seated on the work table from the previous process, and determining and aligning an alignment position for grinding the liquid crystal panel from the image of the alignment mark;   A third step of grinding the aligned liquid crystal panel to a grinding stage;   A fourth step of moving the ground-finished liquid crystal panel from the grinding stage to the alignment stage but moving to the alignment position set in the second step;   A fifth step of acquiring an image of a predetermined position during the edge while moving the liquid crystal panel of the alignment stage; Detecting a grinding line from the obtained image, calculating a distance between the grinding line and the reference mark, and determining an angle between the reference line and the grinding line of the virtual line parallel to the moving direction of the liquid crystal panel; And The distance between the grinding line and the reference mark calculated in the sixth step and the angle between the virtual reference line and the grinding line are calculated to be perpendicular to the grinding line and to the reference mark. And a seventh step of identifying a defect. The method of claim 5, wherein the inspection apparatus for performing the inspection operation to correct the distortion of the image plane during the optical system setup, the step, Acquiring an image of a checkerboard circular point and a correcting plate that knows exact coordinates of the circular point by using an image acquisition unit of an inspection apparatus; And And obtaining a center point of the circular point through the image processing, and correcting the distortion of the image plane by using the coordinates of the center point as the coordinates of the correction plate. In the processing apparatus of the liquid crystal panel, An alignment stage for aligning the liquid crystal panel for grinding, a grinding stage for performing grinding, and an inspection stage for inspecting the liquid crystal panel ground at the grinding stage, and reciprocating between the alignment stage and the inspection stage and the grinding stage. While the work table for transporting the liquid crystal panel is provided, the inspection stage is provided with a camera (14) (14a) installed to acquire an image for the inspection of the alignment and the grinding portion, and the grinding stage is installed on the grinding stage The grinding wheels 24 and 24a for carrying out the operation, the camera guides 16 and 16a installed for the movement of the cameras 14 and 14a, and the work table 12 for the inspection stage 11 and the grinding stage. And a guide rail (22) for guiding movement to (20). The method of claim 7,  The liquid crystal panel processing apparatus includes a machine control unit for driving a work table, an image acquisition unit for storing an image acquired by a camera, and a central control unit for reading an image of the image acquisition unit, and the central control unit and the machine control unit provide a signal. Processing device for a liquid crystal panel, characterized in that driving while giving and receiving.

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